GAITHERSBURG, Md. (AP) — Police have charged four Montgomery County teenagers in the death of a 34-year-old man whose body was found in a shallow grave in August.

According to court documents filed Wednesday, the victim, Marvin Vargas-Osorio, was lured to the already-made grave in the Germantown area of the county, and then fatally stabbed by as many as five assailants.

Investigators believe Vargas-Osorio's body was in the grave less than six months.